Thanks for that Dave, maybe that could be the answer to my problems. I will look into it!
Sae: My two main criteria are that the software must create fully accessible pages and also the WYSIWIG editor must support Japanese and Russian characters as well as Latin. I think this is pretty standard as they are unicode characters but I could be wrong.
The site will be relatively simple and there will not be much user interaction. Things like votes and ratings etc will not be used. Fundamentally the system needs to be able to add/edit/delete page content in a as simple as possible manner - that's pretty much it - I dont know if postnuke may be a little 'overkill' for what i need.